一、音頻文件格式轉換

1）安裝fluent-ffmpeg和ffmpeg插件

npm install fluent-ffmpeg;
npm install ffmpeg;

2）mp3轉wav
test.js文件：

const ffmpeg = require('fluent-ffmpeg');ffmpeg('./test.mp3')
.format('wav')
.audioBitrate('16k')
.audioFrequency(16000)
.audioChannels(1)
.on('error', function(err){console.error('An error occurred: ', err);
})
.on('progress', (progress) => {console.log('Processing: ' + progress.targetSize + ' KB converted');
})
.on('end', function(){console.log('Processing finished !');
})
.save('test.wav');

3) 執行轉換

node test.js

運行test.js文件，報錯“An error occurred: Error: Cannot find ffmpeg”，如下圖所示

二、“An error occurred: Error: Cannot find ffmpeg”問題解決辦法

1）安裝’@ffmpeg-installer/ffmpeg’

npm install @ffmpeg-installer/ffmpeg

2）test.js文件修改

const ffmpegInstaller = require('@ffmpeg-installer/ffmpeg');
const ffmpeg = require('fluent-ffmpeg');
ffmpeg.setFfmpegPath(ffmpegInstaller.path);ffmpeg('./test.mp3')
.format('wav')
.audioBitrate('16k')
.audioFrequency(16000)
.audioChannels(1)
.on('error', function(err){console.error('An error occurred: ', err);
})
.on('progress', (progress) => {console.log('Processing: ' + progress.targetSize + ' KB converted');
})
.on('end', function(){console.log('Processing finished !');
})
.save('test.wav');